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Mach is a unit of speed based on the speed of sound (which varies with altitude and pressure). Mach 1 is the speed of sound, 340.29 m/sec or about 761.2 mph at sea level. Mach 2.5 would be 2.5 times as fast, or about 1900 mph.

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12y ago
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13y ago

it's different for what elevation you are at, if you are at sea level it's faster than if you are at 10,000 feet.

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11y ago

Speed of sound = 768mi/h

768mi/h x 2.35 = 1804.8mi/h

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14y ago

1522.4141 mph

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11y ago

Mach 2.5 = 1,903 mph

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13y ago

Mach 2.5 = about 1,853.9 mph

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12y ago

mach 25 = 19030.18 mph

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10y ago

Mach 2.25 is about 1,713 mph

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10y ago

mach 2.25

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Q: How many miles per hour is mach 2.5?
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